Ice Shaker: Bring your Ice Shaker bottle to the gym, office, beach, on road trips, tailgating, sports games, hunting, everywhere! This bottle is part of the official Gronk Ice Shaker product line, built by the Gronkowski Brothers. Unique Design: The Ice Shaker 26 Oz bottle has measurement markings so it is easy to fill and a tapered design so it fits in a standard sized cup holder. For All Occasions: Ice Shaker bottles are not just for protein powder or pre workout. Use this shaker bottle for coffee and smoothies or, use the removable agitator to transform the bottle into a cocktail shaker. Easy to Use: Ice Shaker bottles have a BPA-free, leak-proof pop top that is easy to open but stays secure while shaking. To mix protein, add the agitator in the bottle to blend with ease. Premium Quality: Ice Shaker bottles are double wall vacuum insulated and sweat proof water bottles that hold ice for 30+ hours. They are made with premium stainless steel that does not absorb odor or stains.